PLAISTOW, N.H. (AP) — A man accused of severely beating and burning the 3-year-old son of his girlfriend has been indicted on a new charge of first-degree assault, alleging that he caused traumatic injury to the child.

Dow had pleaded not guilty in December to multiple assault and other charges involving the treatment of the boy.

The girlfriend, 24-year-old Jessica Linscott of Plaistow, pleaded guilty last month to several charges and was sentenced to at least 2½ years in prison for failing to get help for her son. She's expected to testify against Dow.

The boy was hospitalized with a traumatic brain injury and burns to his wrist and fingers last year. The couple were arrested at a Florida theme park.